Production of ammonia.



CARL BOSCH AND AIIWIN MIT'IASCH, 0F LUDWIGSHAFEN-ON-THE-RHINE, GER

ASSIGNORS TO BADISCHEANILIN 8; SODA FABRIK, OF LUDWIGSHAFEN-ON-THE- RHINE, GERMANY, A CORPORATION.

PRODUCTION OF AMMO.

wearer.

No Drawing.

To all whom it may concern:

Be it known that we, CARL Boson and ALWIN Mrr'rAsoH, subjects, respectively, of the King of Prussia and the King of Saxony, residing at Ludwigshafen on the Rhine,

Germany, have invented new and useful Tmusing the purest iron obtainable in this manner are extremely small. We havenow made the surprising observation that the pure iron possesses a considerably better action, that is to say, a considerable acceleration in the formation of ammoniais secured already at comparatively low temperatures lying'considerably below 900 (1, if the pure iron in tended for the catalyst is produced from the oxid or other compound at relatively low temperatures, preferably not exceeding 600 (1, and care is taken that during the catalysis it be not heated above this temperature. The reduction is carried out preferably by Specification of Letters Ratent.

Patented oat. at, le t.

Application filed November 18, 1911. Serial 1t 0. 061,018.-

means of hydrogen, but it can also be brought about in any other manner, for instance with ammonia, in which case the pure iron is obtained in the form of a nitrid. In

this invention ure iron nitrid is equivalent" to pure iron.

f desired, however, the pure ferric oxid, ferroso-ferric oxid, etc., can be introduced into the contact space and the gas mixture be passed over it from the start below the aforementionedtemperature.

Now what we claim is 1. The process of producing ammonia catalytically by passing a mixture of nitrogen and hydrogen over pure iron prepared from a compound thereof at a temperature not exceeding about 600 C. p

2. The rocess of producing ammonia catal ytical y by passing a mixture of nitro-' gen and hydrogen over pure oxid of iron at a temperature not exceeding about 600 (1, and then continuing passing the nitrogen and hydrogen also at a temperature not exceeding about 600 C. after the iron has.

been reduced to,the metallic state.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

' CARL BOSCH.

ALWIN MTTTASGH.

Witnesses:

J. Arno. Lnox n, A. O. Trr'rN. 

